diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index e7a4783ef2..8b11f23a3c 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -66,7 +66,7 @@ GEM
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     parallel (1.22.1)
-    parallel_tests (3.7.3)
+    parallel_tests (3.8.1)
       parallel
     parlour (6.0.1)
       commander (~> 4.5)